Home Improvement Asked by Quasi_Stomach on April 16, 2021
I installed 3 smart switches which are all on the same circuit in my house. I have never changed a light switch before, but I followed the directions very closely and watched a couple of Youtube videos to help me understand the different wires in the gang boxes. All the switches seem to be working (2 single pole switches and 1 3-way switch — I haven’t replaced the other 3-way switch). All of the switches have a light on the button. When I put my non-contact voltage tester near any of the switches, it beeps. Is this normal? Safe?
Edit:
To be clear, the voltage tester doesn’t respond to any of the other switches in my house, but of course those don’t have lights or use the neutral wire.
ncv's will go off for just about anything. never trust an NCV with your life. cheaper ones will go off from shaking them.
i was in a house once where it went off in the entire upstairs. the house was also below large powerlines.
knob and tube , switch loops (where there is no neutral or ground) have a larger electric field. also a loose neutral could cause this.
check with a multimeter. place one contact one a "hot" screw and the other on the metal yoke or a ground wire. you should read a voltage. 0 is bad. 0 means the yoke isn't grounded and may carry a current.
I just checked and my NCV doesn't go off next to newer romex wired switches but does with the older switch looped switches. (klien ncvt-1).
my Commercial electric brand NCV will go off by rubbing it on my shirt. or when i put it back in my tool belt or when i walk around with it on in my pocket.
(ALso note that you only use a dimmer on one side of a 3way system)
Answered by RadioSpace on April 16, 2021
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